Pump-plunger



( No Modei.)

2 Sheets-Sheet 1.

P'. H. & T. A. SPRAGUE.

PUMP PLUNGER. V No. 262,845. Patented Aug. 15, 1882 v V I x W I \4 V\ IM4 62% /7L' .fl Q? WITNESSES INVENTOR:

ATTORNEYS.

UNITED STATES PATENT OFFICE.

PHILIP H. SPRAGUE AND TOBIAS A. SPRAGUE, OF CORNELL, ILLINOIS.

PUMP-PLUNGER.

SPECIFICATION forming part of Letters Patent No. 262,845, dated August15, 1882. 4 Application filed January 21, 1882. (No model.)

To all whom it may concern Be it known that we, PHILIP H. SPRAGUE andTOBIAS A. SPRAGUE, of Cornell, in the county of Livingston and State ofIllinois,have invented a new and useful Improvement in Pump-Plungers, ofwhich the following is a full, clear, and exact description.

Our invention for wood pumps relates to that class of pump plungers orbuckets which are adapted to be expanded for fitting the plunger to thepump-tube and for taking up the wear; and the invention consists in theconstruction, arrangement, and combination of parts, as hereinafterdescribed and claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional elevation of our improved plunger. Fig. 2 is aplan view of the bottom plate of the plunger; and Figs. 3, 4, and 5 aresectional elevations, showing modifications of our improved plunger.

The main parts of the plunger consist of the metal bottom plate orcasting, A, which carries the valve or, the adjustable flaring ring B,which carries therodsff, by which the plunger is attached to thepump-rod F, and the leather or rubber outside ring or sleeve, D. Themain plate A is cast with the outside flange, b, which is slightlyinclined toward the center of the plate, and with the collar d, which isof greater height than the flange b, and is screwthreaded,-either uponthe outside or inside, for receiving or being screwed upon the flaringring B. The central portion, g, of the ring A forms the valve-seat, andhas the valve a. secured to it by the screw 0, except as hereinafterstated.

In the form of plungershown in Figs. 1, 3, and 5 the ring B is screwedupon the outside of the collar cl, and is adapted to be adjusted thereonby means of the screw-threads, by which they are attached together, aswill be clearly understood from the drawings. Upon the outside of thering B is placed the leather or rubber sleeve D, the lower edge of whichis placed within the flange b, and is held in place by the loose ring h,placed between the lower edge of the sleeve and the collar (1, as shown.

The outside of this sleeve D runs in contact with the pump-tubing, andis thus the wearing-surface of the plunger, and in order that the pumpmay work easy and well this sleeve must be accurately adjusted to fitthe tubing, and this adjustment is accomplished by the ring B, which, asabove mentioned, is flaring, and is adapted to be screwed a greaterorless distance upon the collar d to expand the sleeve D outwardly orpermit its contraction,

as required, to cause it to fit the tubing when first put in the pump orto take up the wear of the sleeve after considerable use.

In the form of plunger shown in Fig. 4 the collar cl is internallyscrew-threaded and the ring B is cast in the form shown, with the flangeb, which is externally screw-threaded and fits inside the collar d. y

In the form of plunger shown in Figs. 3 and 5 the valve-seat g is formedat the top of the collar d, instead of at the bottom, as shown in Figs.1 and 4, and in the form shown in Fig. 5 the valve a, instead of beingan ordinary weighted flap-valve, is a circular disk of metal cast withthe central arms, j j. This valve is held in place so as to open andclose the opening in the valve-seat as the plunger is operated, by meansof the narrow cross-piece k, cast with the ring B, and the narrowcrosspiece a, cast with the main casting or plate A, which cross-piecesare centrally perforated for the passage of the armsjj, as shown.

By this construction of the plunger it will be seen that the plunger maybe easily and -accurately fitted to the pump-tubing by the adjustment ofthe main castings A andB upon each other, and that any wear of thesleeveD of the plunger may be easily taken up, thus making the plungervery durable and always efficient in its action; and it will also beseen that no nails, screws, or similar fastenings are required in theplunger, as all of the parts are put together by rigid and positiveconnections.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent- 1. The main plate A, formed with the inclinedflange b and the collar d, in combination with the ring B and the sleeveD, substantially as and for the purposes set forth.

5. The ring B, cast with the cross-piece 7c, and the main plate A, castwith the cross-piece 'n in combination with the disk (1/, formed with 5the arms jj, substantially as described.

2. The adjustable flaring ring B, in combination with the sleeve 1) andthe main plate A, formed with theinclined flange b, substan- I tially asdescribed.

3. The main plate A, formed with the inclined flange b and the threadedcollar d, in com'binationwith the sleeve 1), threaded flaring ring B,and the ring h, substantially as and for the purposes set forth.

4. The main plate A, formed with the flange l PHILIP H. SPRAGUE. TOBIASA. SPRAGUE.

' Witnesses: HEZEKIAH BOLT, b and. with the internallythreaded collar0?, DAVID HEKMAN.

substantially as and for the purposes set forth.

